Langmuir and Langmuir-Blodgett films of a viologen derivative

We present here the study of a symmetrically substituted viologen derivativ e, 1,1'-dioctadecyl 4,4'-bipyridinium salt, at the air-water interface and arranged in Langmuir-Blodgett (LB) films which were characterized using W-v is spectroscopy. Detailed research of the electrochemical behavior of this molecule in LB films has been performed in terms of the nature of the count erion present in the water subphase, the number of layers, the transference pressure, and the nature of the electrolyte.